Red-faced Mary lets slip her next X Factor song

X FACTOR sensation Mary Byrne yesterday gave away the secret of next weekend’s song – and admitted she is shrinking.

She’s lined up to sing the Faith Hill number, There You’ll Be, from the Pearl Harbour sound-track – and she has dropped a dress-size too.

The 50-year-old Ballyfermot, Dublin, supermarket cashier is among favourites to win this year’s show.